Samarasekara, D.T.M.W.; Weerasinghe, W.A.D.S.S.; Jayathilaka, Y.M.C.D.; Vidanapathirana, K.P.(Faculty of Applied Sciences, Wayamba University of Sri Lanka, Kuliyapitiya, 2015)
Pathirana, H.P.D.A.; Jayathilake,Y.M.C.D.; Weerasinghe, W.A.D.S.S.; Perera, K.S.(Faculty of Applied Sciences, Wayamba University of Sri Lanka, Kuliyapitiya, 2015)